package com.xiaoyu.studyworkspace.intercepeter;

import com.xiaoyu.studyworkspace.common.util.BaseContext;
import com.xiaoyu.studyworkspace.common.util.JwtUtil;
import com.xiaoyu.studyworkspace.properties.JwtProperties;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
@Slf4j
public class JwtTokenInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getTokenName());
        //2、校验令牌
        try {
//            log.info("jwt校验:{}", token);
            String userid = JwtUtil.parseToken(token, jwtProperties.getSecretKey());
            //removeCurrentId，tomcat有线程复用，得清空
            BaseContext.removeCurrentId();
            //利用Threadlocal保存现在的线程id
            BaseContext.setCurrentId(userid);
//            log.info("token验证成功");
            //3、通过，放行
            return true;
        } catch (Exception ex) {
//            log.info("token验证失败");
//          throw new LoginFailedException("登录信息失效,重新登录");
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
}
